Which of the following materials is commonly used for piping in plumbing applications?

Copper is commonly used for piping in plumbing applications due to its excellent thermal conductivity, corrosion resistance, and durability. It is often chosen for water supply lines because it can handle high temperatures and pressures, making it suitable for both hot and cold water systems. Additionally, copper has natural antimicrobial properties, which can contribute to maintaining the safety and quality of potable water.

The other materials listed are not appropriate choices for plumbing applications in the same way. Glass, while useful in specific contexts like laboratory settings or decorative fixtures, is not practical for standard piping due to its fragility and inability to handle water pressure in most scenarios. Wood is also unsuitable as a material for plumbing pipes, as it can absorb water, swell, and eventually decay, leading to leaks and other structural issues. Plastic wrap is entirely inadequate for plumbing purposes as it's not designed to handle pressure or carry any fluids effectively.